[PATCH v7 02/13] clk: apn806: Turn the eMMC clock as optional for dts backwards compatible
From: Gregory CLEMENT <hidden>
Date: 2017-03-30 15:27:26
Also in:
linux-clk, linux-devicetree, linux-mmc, lkml
Subsystem:
arm/marvell kirkwood and armada 370, 375, 38x, 39x, xp, 3700, 7k/8k, cn9130 soc support, common clk framework, the rest · Maintainers:
Andrew Lunn, Gregory Clement, Sebastian Hesselbarth, Michael Turquette, Stephen Boyd, Linus Torvalds
First version of the binding didn't have the eMMC clock. This patch allows to not registering the eMMC clock if it is not present in the device tree. Then the device tree can be backwards compatible. Suggested-by: Stephen Boyd <redacted> Signed-off-by: Gregory CLEMENT <redacted> --- drivers/clk/mvebu/ap806-system-controller.c | 20 +++++++++++++------- 1 file changed, 13 insertions(+), 7 deletions(-)
diff --git a/drivers/clk/mvebu/ap806-system-controller.c b/drivers/clk/mvebu/ap806-system-controller.c
index 901d89c4ab4a..103fe18a3c29 100644
--- a/drivers/clk/mvebu/ap806-system-controller.c
+++ b/drivers/clk/mvebu/ap806-system-controller.c@@ -136,13 +136,19 @@ static int ap806_syscon_clk_probe(struct platform_device *pdev) } /* eMMC Clock is fixed clock divided by 3 */ - of_property_read_string_index(np, "clock-output-names", - 4, &name); - ap806_clks[4] = clk_register_fixed_factor(NULL, name, fixedclk_name, - 0, 1, 3); - if (IS_ERR(ap806_clks[4])) { - ret = PTR_ERR(ap806_clks[4]); - goto fail4; + if (of_property_read_string_index(np, "clock-output-names", + 4, &name)) { + ap806_clk_data.clk_num--; + dev_warn(&pdev->dev, + "eMMC clock mising: update the device tree!\n"); + } else { + ap806_clks[4] = clk_register_fixed_factor(NULL, name, + fixedclk_name, + 0, 1, 3); + if (IS_ERR(ap806_clks[4])) { + ret = PTR_ERR(ap806_clks[4]); + goto fail4; + } } of_clk_add_provider(np, of_clk_src_onecell_get, &ap806_clk_data);
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